Oil companies that have claimed more than a billion dollars in tax credits for burying carbon dioxide underground just got a windfall from Congress, which expanded that incentive as part of the government spending bill signed into law on Friday.

Oilmen, wildcatters and particularly refiners are reaping billions in gains from President Donald Trump’s tax overhaul, helping boost the staying power of old-style energy even as the world searches for cleaner fuels.

Congress is close to lifting a 40-year-old ban on energy development in Alaska’s Arctic National Wildlife Refuge, but drilling for oil in that frozen wilderness may still be years away as the effort faces exhaustive environmental reviews and likely lawsuits.

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